Pileus Git - ~andy/gtk/blob - gtk/gtkcssshorthandproperty.c

   1 /*
   2  * Copyright © 2011 Red Hat Inc.
   3  *
   4  * This library is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU Lesser General Public
   6  * License as published by the Free Software Foundation; either
   7  * version 2.1 of the License, or (at your option) any later version.
   8  *
   9  * This library is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12  * Lesser General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU Lesser General Public
  15  * License along with this library; if not, write to the Free Software
  16  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  *
  18  * Authors: Benjamin Otte <otte@gnome.org>
  19  */
  20
  21 #include "config.h"
  22
  23 #include "gtkcssshorthandpropertyprivate.h"
  24
  25 #include "gtkcssstylefuncsprivate.h"
  26 #include "gtkcsstypesprivate.h"
  27 #include "gtkintl.h"
  28 #include "gtkprivatetypebuiltins.h"
  29
  30 enum {
  31   PROP_0,
  32   PROP_SUBPROPERTIES,
  33 };
  34
  35 G_DEFINE_TYPE (GtkCssShorthandProperty, _gtk_css_shorthand_property, GTK_TYPE_STYLE_PROPERTY)
  36
  37 static void
  38 gtk_css_shorthand_property_set_property (GObject      *object,
  39                                          guint         prop_id,
  40                                          const GValue *value,
  41                                          GParamSpec   *pspec)
  42 {
  43   GtkCssShorthandProperty *property = GTK_CSS_SHORTHAND_PROPERTY (object);
  44   const char **subproperties;
  45   guint i;
  46
  47   switch (prop_id)
  48     {
  49     case PROP_SUBPROPERTIES:
  50       subproperties = g_value_get_boxed (value);
  51       g_assert (subproperties);
  52       for (i = 0; subproperties[i] != NULL; i++)
  53         {
  54           GtkStyleProperty *subproperty = _gtk_style_property_lookup (subproperties[i]);
  55           g_assert (GTK_IS_CSS_STYLE_PROPERTY (subproperty));
  56           g_ptr_array_add (property->subproperties, subproperty);
  57         }
  58       break;
  59     default:
  60       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
  61       break;
  62     }
  63 }
  64
  65 static void
  66 _gtk_css_shorthand_property_assign (GtkStyleProperty   *property,
  67                                     GtkStyleProperties *props,
  68                                     GtkStateFlags       state,
  69                                     const GValue       *value)
  70 {
  71   GParameter *parameters;
  72   guint i, n_parameters;
  73
  74   parameters = property->unpack_func (value, &n_parameters);
  75
  76   for (i = 0; i < n_parameters; i++)
  77     {
  78       _gtk_style_property_assign (_gtk_style_property_lookup (parameters[i].name),
  79                                   props,
  80                                   state,
  81                                   &parameters[i].value);
  82       g_value_unset (&parameters[i].value);
  83     }
  84   g_free (parameters);
  85 }
  86
  87 static void
  88 _gtk_css_shorthand_property_query (GtkStyleProperty   *property,
  89                                    GtkStyleProperties *props,
  90                                    GtkStateFlags       state,
  91                                    GtkStylePropertyContext *context,
  92                                    GValue             *value)
  93 {
  94   property->pack_func (value, props, state, context);
  95 }
  96
  97 static gboolean
  98 gtk_css_shorthand_property_parse_value (GtkStyleProperty *property,
  99                                         GValue           *value,
 100                                         GtkCssParser     *parser,
 101                                         GFile            *base)
 102 {
 103   GtkCssShorthandProperty *shorthand = GTK_CSS_SHORTHAND_PROPERTY (property);
 104   GValueArray *array;
 105   guint i;
 106
 107   array = g_value_array_new (shorthand->subproperties->len);
 108   for (i = 0; i < shorthand->subproperties->len; i++)
 109     g_value_array_append (array, NULL);
 110
 111   if (_gtk_css_parser_try (parser, "initial", TRUE))
 112     {
 113       /* the initial value can be explicitly specified with the
 114        * ‘initial’ keyword which all properties accept.
 115        */
 116       for (i = 0; i < shorthand->subproperties->len; i++)
 117         {
 118           GValue *val = g_value_array_get_nth (array, i);
 119           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 120           g_value_set_enum (val, GTK_CSS_INITIAL);
 121         }
 122     }
 123   else if (_gtk_css_parser_try (parser, "inherit", TRUE))
 124     {
 125       /* All properties accept the ‘inherit’ value which
 126        * explicitly specifies that the value will be determined
 127        * by inheritance. The ‘inherit’ value can be used to
 128        * strengthen inherited values in the cascade, and it can
 129        * also be used on properties that are not normally inherited.
 130        */
 131       for (i = 0; i < shorthand->subproperties->len; i++)
 132         {
 133           GValue *val = g_value_array_get_nth (array, i);
 134           g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 135           g_value_set_enum (val, GTK_CSS_INHERIT);
 136         }
 137     }
 138   else if (!shorthand->parse (shorthand, array->values, parser, base))
 139     {
 140       g_value_array_free (array);
 141       return FALSE;
 142     }
 143
 144   /* All values that aren't set by the parse func are set to their
 145    * default values here.
 146    * XXX: Is the default always initial or can it be inherit? */
 147   for (i = 0; i < shorthand->subproperties->len; i++)
 148     {
 149       GValue *val = g_value_array_get_nth (array, i);
 150       if (G_IS_VALUE (val))
 151         continue;
 152       g_value_init (val, GTK_TYPE_CSS_SPECIAL_VALUE);
 153       g_value_set_enum (val, GTK_CSS_INITIAL);
 154     }
 155
 156   g_value_unset (value);
 157   g_value_init (value, G_TYPE_VALUE_ARRAY);
 158   g_value_set_boxed (value, array);
 159   return TRUE;
 160 }
 161
 162 static void
 163 _gtk_css_shorthand_property_class_init (GtkCssShorthandPropertyClass *klass)
 164 {
 165   GObjectClass *object_class = G_OBJECT_CLASS (klass);
 166   GtkStylePropertyClass *property_class = GTK_STYLE_PROPERTY_CLASS (klass);
 167
 168   object_class->set_property = gtk_css_shorthand_property_set_property;
 169
 170   g_object_class_install_property (object_class,
 171                                    PROP_SUBPROPERTIES,
 172                                    g_param_spec_boxed ("subproperties",
 173                                                        P_("Subproperties"),
 174                                                        P_("The list of subproperties"),
 175                                                        G_TYPE_STRV,
 176                                                        G_PARAM_WRITABLE | G_PARAM_CONSTRUCT_ONLY));
 177
 178   property_class->assign = _gtk_css_shorthand_property_assign;
 179   property_class->query = _gtk_css_shorthand_property_query;
 180   property_class->parse_value = gtk_css_shorthand_property_parse_value;
 181 }
 182
 183 static void
 184 _gtk_css_shorthand_property_init (GtkCssShorthandProperty *shorthand)
 185 {
 186   shorthand->subproperties = g_ptr_array_new_with_free_func (g_object_unref);
 187 }
 188
 189 GtkCssStyleProperty *
 190 _gtk_css_shorthand_property_get_subproperty (GtkCssShorthandProperty *shorthand,
 191                                              guint                    property)
 192 {
 193   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), NULL);
 194   g_return_val_if_fail (property < shorthand->subproperties->len, NULL);
 195
 196   return g_ptr_array_index (shorthand->subproperties, property);
 197 }
 198
 199 guint
 200 _gtk_css_shorthand_property_get_n_subproperties (GtkCssShorthandProperty *shorthand)
 201 {
 202   g_return_val_if_fail (GTK_IS_CSS_SHORTHAND_PROPERTY (shorthand), 0);
 203
 204   return shorthand->subproperties->len;
 205 }
 206